Pink Opal. This 1915 American variety was developed by Helen Fowler, daughter of the famous water gardener and hybridizer W.B. Shaw of Shaw Gardens in Washington, D.C. Pink Opal has many good qualities. Blossoms are cup shaped, very fragrant, of a coral-red color, and are held above the water's surface. Petals are numerous, short, and quite broad. It is one of the finest for cut flower purposes.